What Is Sentence Case?
Sentence case is the way normal sentences look. Only the first word starts with a capital letter, and everything else stays lowercase — just like the sentence you are reading now. For example, “HELLO WORLD. HOW ARE YOU?” becomes “Hello world. How are you?”
This page opens with the Sentence case tool already selected, so you do not have to hunt for the right button. Paste your text, and it is converted at once.
How to Use This Sentence Case Converter
- Paste or type your text in the box above.
- Sentence case is already selected — just check the result.
- Copy it with one click, or download it as a text, PDF, Word or Excel file. You can also upload a whole file (PDF, Word, Excel or CSV) and convert every line inside it at once.
Sentence Case Rules (the Simple Version)
| What the text has | What happens | Example |
|---|---|---|
| First word of a sentence | It starts with a capital letter | hello → Hello |
| After a full stop, ! or ? | The next word starts with a capital letter | “Hi. how are you?” → “Hi. How are you?” |
| Every other word | It stays lowercase | “QUICK BROWN FOX” → “quick brown fox” |
| Names, days and months | The tool makes them lowercase too — put their capitals back by hand | “london” stays “london” until you fix it |
One honest note: this tool capitalizes the start of each sentence and makes everything else lowercase. It does not know which words are names, so “London” and “June” come out small. Read your text once after converting and fix the names — it takes seconds.
Examples (checked by hand)
- “HELLO WORLD. HOW ARE YOU?” → “Hello world. How are you?”
- “the QUICK brown FOX jumps OVER the lazy DOG” → “The quick brown fox jumps over the lazy dog”
- “MEET ME AT 5 PM! BRING THE REPORT.” → “Meet me at 5 pm! Bring the report.”
- “i went to london in june” → “I went to london in june” (then fix it by hand: “I went to London in June”)
Notice the pattern in every example: the first word of each sentence is capital, and every other word is small. The last example shows the one thing to check yourself — names and months.
When to Use Sentence Case
Use sentence case for anything written as normal sentences: emails, essays, messages, reports, captions and comments. It is the default case of everyday English, so it is the right choice whenever your text should simply read normally.
It is also the fastest fix for a caps-lock accident. If you typed a whole paragraph in capitals by mistake, sentence case puts it right in one click — far faster than retyping it or fixing every word by hand.
Why Use Our Sentence Case Converter?
Most free sentence case pages give you a bare box and nothing else. This one gives you the same converter as our main Case Converter tool, with three things the thin competitor pages do not offer: upload a whole file and convert it in one go, download the result in four formats, and Find & Replace inside your text before converting. It is free, it works on a phone, and nothing you paste is stored.
Frequently Asked Questions About Sentence Case
What is sentence case?
Sentence case is the normal way sentences are written: only the first word starts with a capital letter, and the rest stays lowercase, like this sentence. It is the standard case for emails, essays and everyday writing.
What is the difference between sentence case and title case?
In sentence case, only the first word is capital (“The lord of the rings”). In title case, most words start with a capital letter (“The Lord of the Rings”). Normal sentences use sentence case; book and article titles use title case.
Does sentence case keep proper nouns capital?
No — and this is worth knowing. The tool capitalizes the start of each sentence and makes everything else lowercase, so “London” comes out as “london”. Read your text once after converting and put the capitals back on names, days and months.
Can I convert a whole document at once?
Yes. Upload a PDF, Word, Excel or CSV file, convert it, and download the result. That is the feature most simple sentence case pages do not have.
Back to the full Case Converter → · Try the Title Case Converter → · Try the Uppercase Converter → · Try the Lowercase Converter → · Try the Convert Case Converter → · Try the Capital Letters Converter → · Sentence Case vs Title Case: What’s the Difference? →